diff --git a/iphone/Common/DiskFreeSpace.h b/iphone/Common/DiskFreeSpace.h
index 51c8ff425a..b905aec4d0 100644
--- a/iphone/Common/DiskFreeSpace.h
+++ b/iphone/Common/DiskFreeSpace.h
@@ -13,7 +13,7 @@ uint64_t FreeDiskSpaceInBytes()
   }
   else
   {
-    NSLog(@"Error Obtaining Free File System Info: Domain = %@, Code = %@", [error domain], [error code]);
+    NSLog(@"Error Obtaining Free File System Info: Domain = %@, Code = %d", [error domain], [error code]);
     return 0;
   }
 }
diff --git a/map/screen_coverage.cpp b/map/screen_coverage.cpp
index a039909488..4e2378c741 100644
--- a/map/screen_coverage.cpp
+++ b/map/screen_coverage.cpp
@@ -255,15 +255,15 @@ void ScreenCoverage::SetScreen(ScreenBase const & screen)
 
   for (TTileSet::const_iterator it = erasedTiles.begin(); it != erasedTiles.end(); ++it)
   {
-    Tiler::RectInfo ri = (*it)->m_rectInfo;
-    tileCache->UnlockTile((*it)->m_rectInfo);
+    Tiler::RectInfo const & ri = (*it)->m_rectInfo;
+    tileCache->UnlockTile(ri);
     /// here we should "unmerge" erasedTiles[i].m_overlay from m_overlay
   }
 
   for (TTileSet::const_iterator it = addedTiles.begin(); it != addedTiles.end(); ++it)
   {
-    Tiler::RectInfo ri = (*it)->m_rectInfo;
-    tileCache->LockTile((*it)->m_rectInfo);
+    Tiler::RectInfo const & ri = (*it)->m_rectInfo;
+    tileCache->LockTile(ri);
   }
 
   tileCache->Unlock();
diff --git a/platform/platform.hpp b/platform/platform.hpp
index ab9e8e98b6..a39d439181 100644
--- a/platform/platform.hpp
+++ b/platform/platform.hpp
@@ -135,4 +135,4 @@ public:
   string DefaultUrlsJSON() const;
 };
 
-extern "C" Platform & GetPlatform();
+extern Platform & GetPlatform();
diff --git a/platform/platform_ios.mm b/platform/platform_ios.mm
index 26edf42938..c6824f29d0 100644
--- a/platform/platform_ios.mm
+++ b/platform/platform_ios.mm
@@ -198,7 +198,7 @@ void Platform::RunAsync(TFunctor const & fn, Priority p)
 }
 
 ////////////////////////////////////////////////////////////////////////
-extern "C" Platform & GetPlatform()
+extern Platform & GetPlatform()
 {
   static Platform platform;
   return platform;
diff --git a/platform/platform_qt.cpp b/platform/platform_qt.cpp
index ad93af0019..5913996265 100644
--- a/platform/platform_qt.cpp
+++ b/platform/platform_qt.cpp
@@ -59,7 +59,7 @@ int Platform::VideoMemoryLimit() const
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-extern "C" Platform & GetPlatform()
+extern Platform & GetPlatform()
 {
   class PlatformQt : public Platform
   {
diff --git a/tools/mkspecs/iphonedevice-clang/qmake.conf b/tools/mkspecs/iphonedevice-clang/qmake.conf
index d92fd856b6..6c0da306fb 100644
--- a/tools/mkspecs/iphonedevice-clang/qmake.conf
+++ b/tools/mkspecs/iphonedevice-clang/qmake.conf
@@ -82,7 +82,7 @@ QMAKE_CFLAGS_X86          += -arch i386
 QMAKE_OBJECTIVE_CFLAGS_X86  += -arch i386
 QMAKE_CFLAGS_DWARF2       += -gdwarf-2
 
-QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch
+QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch $$QMAKE_CFLAGS_HIDESYMS
 
 QMAKE_CXXFLAGS            += $$QMAKE_CFLAGS
 QMAKE_CXXFLAGS_DEPS       += $$QMAKE_CFLAGS_DEPS
diff --git a/tools/mkspecs/iphonedevice-g++42/qmake.conf b/tools/mkspecs/iphonedevice-g++42/qmake.conf
index 093f4255ca..973b78a3eb 100644
--- a/tools/mkspecs/iphonedevice-g++42/qmake.conf
+++ b/tools/mkspecs/iphonedevice-g++42/qmake.conf
@@ -81,7 +81,7 @@ QMAKE_CFLAGS_X86          += -arch i386
 QMAKE_OBJECTIVE_CFLAGS_X86  += -arch i386
 QMAKE_CFLAGS_DWARF2       += -gdwarf-2
 
-QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch
+QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch $$QMAKE_CFLAGS_HIDESYMS
 
 QMAKE_CXXFLAGS            += $$QMAKE_CFLAGS
 QMAKE_CXXFLAGS_DEPS       += $$QMAKE_CFLAGS_DEPS
diff --git a/tools/mkspecs/iphonedevice-llvm/qmake.conf b/tools/mkspecs/iphonedevice-llvm/qmake.conf
index bf0f769a31..aa08cb26a5 100644
--- a/tools/mkspecs/iphonedevice-llvm/qmake.conf
+++ b/tools/mkspecs/iphonedevice-llvm/qmake.conf
@@ -82,7 +82,7 @@ QMAKE_CFLAGS_X86          += -arch i386
 QMAKE_OBJECTIVE_CFLAGS_X86  += -arch i386
 QMAKE_CFLAGS_DWARF2       += -gdwarf-2
 
-QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch
+QMAKE_OBJECTIVE_CFLAGS    += $$QMAKE_CFLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch $$QMAKE_CFLAGS_HIDESYMS
 
 QMAKE_CXXFLAGS            += $$QMAKE_CFLAGS
 QMAKE_CXXFLAGS_DEPS       += $$QMAKE_CFLAGS_DEPS